Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/into_binary.md

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+---
+title: into binary
+layout: command
+version: 0.59.0
+---
+
+Convert value to a binary primitive
+
+## Signature
+
+```> into binary ...rest```
+
+## Parameters
+
+ -  `...rest`: column paths to convert to binary (for table input)
+
+## Examples
+
+convert string to a nushell binary primitive
+```shell
+> 'This is a string that is exactly 52 characters long.' | into binary
+```
+
+convert a number to a nushell binary primitive
+```shell
+> 1 | into binary
+```
+
+convert a boolean to a nushell binary primitive
+```shell
+> $true | into binary
+```
+
+convert a filesize to a nushell binary primitive
+```shell
+> ls | where name == LICENSE | get size | into binary
+```
+
+convert a filepath to a nushell binary primitive
+```shell
+> ls | where name == LICENSE | get name | path expand | into binary
+```
+
+convert a decimal to a nushell binary primitive
+```shell
+> 1.234 | into binary
+```
+